Ask question

Ask question

All categories

3 years ago

7

Round to the underlined place.

1 answer:

nignag [31]3 years ago

8 0

Answer:

158

Step-by-step explanation:

You might be interested in

Elsie bought a video game for $85.00. If the store charges 170% of its cost for the game, how much is the store’s profit?

Anettt [7]

If we take 85 to be the 100%, how much is the retail price, namely the 170%?

$\bf \begin{array}{ccll}
amount&\%\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
85&100\\
x&170
\end{array}\implies \cfrac{85}{x}=\cfrac{100}{170}\implies \cfrac{85\cdot 170}{100}=x$

so the retail price is "x", thus the profit will be x - 85.

7 0

3 years ago

Sasha noticed that the graph of the sales of yearbooks represented a proportional relationship. How could she have calculated th

Sphinxa [80]

Sasha can look at the graph and check to see that when she plots the points on the graph, they end up as a straight line. She can also draw a table to test the values and see if when you divide y/x you get the same answer for all of them.

5 0

3 years ago

Read 2 more answers

Ms. Mastrianni hung artwork on 2/5 of a bulletin board. She hung math papers on 1/5 of the same bulletin board. What part of the

jekas [21]

Answer: The part of the bulletin board has artwork or math papers $=\dfrac35$

Step-by-step explanation:

Given: Part of bulletin board has artwork = $\dfrac{2}{5}$

Part of bulletin board has math papers = $\dfrac{1}{5}$

The part of the bulletin board has artwork or math papers = $\dfrac25+\dfrac15$

$=\dfrac35$

Hence, the part of the bulletin board has artwork or math papers $=\dfrac35$

7 0

3 years ago

vesna_86 [32]

Answer:

k=-3

x=63

Step-by-step explanation:

The equation for direct variation is

y = kx where k is the constant of variation

We know x and y we can solve for k

-87 = k*29

Divide each side by 29

-87/29 = k

-3 =k

y= -3x

Now we know y = -189, we can find x

-189 = -3x

Divide by -3

-189/-3 = -3x/-3

63 =x

4 0

3 years ago

On average, the parts from a supplier have a mean of 31.8 inches and a standard deviation of 2.4 inches. Find the probability th

lutik1710 [3]

Answer:

The probability is P=0.9545.

The empirical rule is consistent, as it would have estimate a probability of 95%.

Step-by-step explanation:

We have a random variable with mean 31.8 in. and standard deviation of 2.4 in.

We have to find the probability that a randomly selected part from this supplier will have a value between 27.0 and 36.6 in.

If we assumed a normal-like distribution, we can calculate the z-score for both values:

$z_1=\dfrac{X_1-\mu}{\sigma}=\dfrac{27-31.8}{2.4}=\dfrac{-4.8}{2.4}=-2\\\\\\z_2=\dfrac{X_2-\mu}{\sigma}=\dfrac{36.6-31.8}{2.4}=\dfrac{4.8}{2.4}=2$

That can be interpreted as an interval that is 2 standard deviations wide, centered on the mean.

This interval has a probability of:

$P(27.0$

If we apply the empirical rule, with 2 standard deviations from the mean, we would have estimate a probability of 95%, which is accurate.

3 0

3 years ago